2010 Mustang GT 3" exhaust system with X pipe for Stainless Works headers-works with header and install kit #'s GT5CAT and GT5OR. Includes (2) 3" inlet, 2 1/2" core, 3" outlet chambered turbo mufflers, (2) 4" mirror polished rolled edge tips, (1) 3" X pipe, (2) 3" tailpipes, clamps. Dyno tested with stock tune and factory manifolds with x-pipe to increase performance by 15 hp and 12 ft. lbs. of torque over stock exhaust.